Electric fender tool



May 10, 1932. N. PESOLA fi J ELECTRIC FENDER TOOL Filed April 21, 1931 2Sheets-Sheet l 2 Sheets-Sheet 2 Filed April 21. 1931 INVENTOR IiatentedMay id, 1932 NIILO rssom, or :rrrcneune, mssAcErrsErr-s nnncmo rnnnnnmoor.

Application filed April 21 1981. Serial No. 531,821.

This invention relates to an electric tool and more particularly to atool designed for use in straightening sheet metal, especiallyautomobile fenders radiators, or other sheet metal parts thereo Theprimary object of the invention is the provision of a tool of thischaracter, wherein the frame thereof is of novel construction so thatthe sheet metal work can be received or introduced thereinto, whereby onthe working of the tool any irregularities in the surface, such as kinksor bends in the work, can be conveniently eradicated or removed.

Another object of the invention is the pro- 135 vision of a tool of thischaracter, wherein the frame thereof is constructed so that an electricdrill with its chuck can be conveniently carried upon the frame wherebythe power from the drill can be utilized for operating the tool, whichis designed especially for straightening sheet metal, such as automobilefenders, radiators, or other metal body construction of the automobile.

A further object of the'iuvention is the provision of a tool of thischaracter, wherein the hammer and the anvil are re'movably supported topermit different types or styles to be interchanged according to thekind of work to be performed by the tool in the use 39 thereof.

A still further object of the invention is the provision of a tool ofthis character, wherein the hammer is equipped with a cushion orcompensating spring which eliminates undue strain upon the moving partsof the tool and also acts as a shock absorber therefor.

A still further object of the invention is the provision of a tool ofthis character which is extremely simple in construction, thoroughlyreliable and elhcient in operation, strong, yet light of weight so thatthe same is readily portable, durable and inexpensive to manufacture.

15 With these and other objects in view the invention consists in thefeatures of construction, combination and arrangement of parts as willbe hereinafter more fully described in detail, illustrated in theaccompanying 5e drawings which disclose the preferred embodiment of theinvention and pointed out in the claim hereunto appended.

In the accompanying drawings:

' Figured is an elevation of the tool constructed in accordance with theinvention.

Figure 2 is a top plan view thereof.

Figure 3 is an end elevation of the tool looking toward the open ormouth end of the frame.

Figure 4 is a View similar to Figure 3 looking toward the other end ofthe tool.

Figure 5 is an enlarged fragmentary longitudinal sectional view takenthrough the hammer of the tool.

' Figure 6 is a fragmentaryvertical sectional view taken through theeccentric and its-connection with the hammer of the tool.

Figure 7 is an elevation of a modified form of hammer mounting and itshammer.

Figure 8 is an edge elevation thereof. 7

Some of the reference characters indicate corresponding parts throughoutthe several views in the drawings.

Referring to the drawings in detail, the tool comprises a frame A,preferably made from metal, although the same may be made from any othermaterial found desirable and is of substantially C-shape in contour,presenting at one end an open mouth B what may be termed the workentrance to the frame. 30 The upper stretch 10 of the frame A has formedlongitudinally thereof a sleeve like hearing 11 in which is fitted apower shaft 12 carrying at its end over the mouth or entrance B of theframe A an eccentric 13 pro- 35 vided with a wrist pin 14 adjustablyengaged at its head 15 in a slot or groove 16' in said eccentric, theconnection between the head and said eccentric being dove-tailed and thepin 14 is locked in adjusted position on the eccentric by a nut 17, thusit being seen that said pin can be adjusted relative to the center ofthe eccentric to vary the throw or stroke of the tool in its operation.

Engaged on the pin 14 is a link 18 which latter is also pivoted at 19 toa hammer C working through a guide head in the form of an eye 20 at theentrance or mouth B of the frame A, the head 20 being formed at the freeend of the upper stretch l0 of said frame and the hammer C will behereinafter more fully described.

The lower stretch 21 of the frame A at the mouth or entrance B supportsa detachable anvil 22 which confronts the hammer C and coacts therewithin the working of the tool.

At the closed end of the frame A is arranged an adjustable bracket 23having a saddle 24, the bracket being slidably connected with the frameA and is held adjusted thereon by a set screw25. Adapted to be placedwithin the saddle 24 is the motor casing 26 of an electric drill of astandard type having arranged in a handle 27 a trigger switch 28 forcontrolling the electric motor of said drill as provided in the casing26 thereof. The drilling shaft 29 of said drill carries the chuck 30designed for detachable coupling of said drill with the power shaft 12on the frame A of the tool so that when the drill is operated its powerwill be transmitted to shaft 12 to the hammer C as will be obvious. Themotor casing 26 of the drill is held in the saddle 24 by means of aclamp yoke 31. thus it being obvious that the drill may be detached atwill on the release of the clamp 31 and uncoupling of the chuck 30 withthe shaft 12 of the frame A and such drill utilized as such.

The hammer C includes a hammering head 32 having a chamber 33 therein inwhich works a plunger 34. the latter being anchored upon by interposedcushion or compensating springs 35 and 36, the head 32 being retained onthe plunger by a closure cap 37 for the chamber 33, the plunger beingconnected by the pivot 19 with the link 18. The hammer when reciprocatedwill relieve strain and absorb shocks and jars through the use of thesprings 35 and 36 in the head 32 of said hammer. which head delivers theblow or successive blows to a piece of Work when resting upon the anvil22 of the tool in the operation of the latter.

In Figures 7 and 8 there is shown a modification of the invention,wherein the hammer head 38 is of a solid formation and through themedium of a coupling 39 carrying a multiple cross spring 40 is yieldablysuspended from an upwardly arched multiple compensating spring 41 whichcarries at its ends links 42, these being connected with the crossspring 40 of the coupling 39. The spring 41 carries medially thereof awrist pin engaging block or coupling head 43 for engaging with the wristpin 14 on the eccentric 13 of the tool. The mounting of the hammer 38 ofthe solid type, as is illustrated in F igures 7 and 8 of the drawingswhen the tool is operated, will take care of shocks and jars and thesaid springs 40 and 41 will act as compensating springs corresponding tothe spring 35 and 36 in the head 32 of the hammer C hereinbeforedescribed.

The eccentric 13 is provided with a balanced weight 44.

It will be apparent that the saddle 24 can be regulated with relation tothe frame A of the tool to properly align the shaft 29 of the drill andthe shaft 12 of the tool for the coupling of these shafts by the chuck30 on the drill.

The work to be operated upon by the tool is introduced through the mouthor entrance B in the frame A of said tool and in the operation of thetool the work is acted upon by the hammer C coacting with the anvil B toenable the straightening of sheet metal material, especially automobilefenders, radiator shells or the like.

The anvil 22 is detachable so that different styles of anvils may bemounted in the frame A of the tool according to the kind of work to beoperated upon thereby.

It is contemplated within the scope of the invention that the powershaft 12 may be con- IlPLtGd through the medium of a suitable flexiblecable with an electric motor not carried by the tool as is the case withthe electric drill and in this way power from the electric motorpositioned at any point removed from said tool will transmit motion tothe tool for the operation thereof. In other Words, the electric drillcan be detached from the frame A of the tool and located stationarilyaway from the sanie, then through a suitable flexible connection withthe shaft 29 the said electric drill power can be transmitted therefromto the hammer head 32 of the tool as will be obvious.

\Vhat is claimed is:

A tool of the character described comprising a substantially C-shapedrigid frame presenting a nose opening between its ends, a bearing sleeveformed at the uppermost portion of said frame, a power shaft journaledin said sleeve, an anvil removably fitted on one end of the frame at thenose opening, a yieldable hammer mounted on the other end of the frameand coactive with the anvil, an eccentric connection between said hammerand said power shaft, a saddle adjustably connected with-the frameopposite the entrance opening, and driving means clamped in the saddleand operatively connected with the power shaft.

In testimony whereof I afiix my signature.

NIILO PESOLA.

